#1D387F#1D387F

#1D387F is a dark, vivid blue. Relative luminance 0.046; OKLCH L 36.5% C 0.125 H 265.0°. Best body text is #FFFFFF at 10.91:1 contrast (WCAG AA passes).

Color values

HEX	#1D387F
RGB	rgb(29, 56, 127)
HSL	hsl(223, 63%, 31%)
HSV	hsv(223, 77%, 50%)
CMYK	cmyk(77.2%, 55.9%, 0%, 50.2%)
CIE-LAB	lab(25.63, 16.86, -43.16)
CIE-LCH	lch(25.63, 46.34, 291.33°)
OKLab	oklab(36.49% -0.0108 -0.1243)
OKLCH	oklch(36.49% 0.125 265)
XYZ	xyz(5.7503, 4.6212, 20.6635)
Luminance	0.0462 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1D387F #7F641D

analogous

#1D697F #1D387F #331D7F

triadic

#1D387F #7F1D38 #387F1D

tetradic

#1D387F #7F1D69 #7F641D #1D7F33

square

#1D387F #7F1D69 #7F641D #1D7F33

split-complementary

#1D387F #7F331D #697F1D

monochromatic

#060C1B #12224D #1D387F #284EB1 #426BD4

Accessibility & contrast

On white

10.91

#1D387F on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.92

#1D387F on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1D387F

10.91:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1D387F	#FFFFFF	#000000	##FFFFFF
##1D387F	1.00	10.91	1.92	10.91
#FFFFFF	10.91	1.00	21.00	1.00
#000000	1.92	21.00	1.00	21.00
##FFFFFF	10.91	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004181

Deuteranopia (green-blind)

#00387E

Tritanopia (blue-blind)

#004955

Achromatopsia (no color)

#3D3D3D

Design tokens & code

CSS

--color: #1d387f;
/* rgb */ color: rgb(29, 56, 127);
/* oklch */ color: oklch(36.5% 0.125 265.0);

Tailwind

colors: {
  custom: {
    50: '#686ea5',
    500: '#1d387f',
    950: '#000000',
  },
}

SCSS

$custom: #1d387f;
$custom-light: #686ea5;
$custom-dark: #000000;

JSON

{
  "hex": "#1d387f",
  "rgb": {
    "r": 29,
    "g": 56,
    "b": 127
  },
  "hsl": {
    "h": 223.469,
    "s": 62.821,
    "l": 30.588
  },
  "oklch": {
    "l": 0.36492,
    "c": 0.12481,
    "h": 265
  },
  "luminance": 0.04622
}

Semantic roles & 50–950 ramp

primary

#1D387F

secondary

#B29445

accent

#B942E6

background

#F6F6FA

surface

#ECEBF4

border

#C7C6CE

text

#07070F

muted

#7A7A7F

Preview Lab

Preview with #1D387F

Body copy rendered with the generated semantic roles for this colour.

Preview Lab → · Contrast checker → · Palette generator →